椭圆的

The inhibition of propargyl alcohol for 1Cr18Ni9Ti stainless steel in hydrochloric acid solution is studied with the cyclic voltammetry and ellipsometry.

采用循环伏安法和椭圆偏振光谱法，研究了丙炔醇(Propargylalcohol，PA)对 1Cr18Ni9Ti不锈钢在含有氯离子的腐蚀环境中的缓蚀作用，实验表明Cl-能使 1Cr18Ni9Ti不锈钢发生点蚀，而缓蚀剂PA对不锈钢受到Cl-的腐蚀起抑制作用。

Results In adult homing pigeons, the contents of ferromagnetic elements in lagenal otoliths were less than 0.7% and were the same order in magnitude as those in saccular and utricular otoliths.

结果 成年信鸽瓶状囊耳石中磁性元素Fe、Co、Ni的含量不足Ca元素的0.7％，与球囊和椭圆囊耳石中的含量为同一数量级。

Male inflorescences spicate or scorpioid cymose; female inflorescences usually 2-8-flowered 1-flowered in S .

匍匐茎节不加厚；叶在上部的茎和分枝，肉质的，干燥时的厚纸质，椭圆状披针形， 1.5-4 * 0.5-1 厘米，侧脉4-6 每边。

Law, an Elliptic Curve Cryptography based Secure and efficient authenticated key agreement protocol - SEAK protocol are proposed.

为此，按照L.Law所定义的认证密钥协商协议的安全特性，提出一种基于椭圆曲线密码体制的安全高效认证密钥协商协议——SEAK协议。

So conforming to the authenticated key agreement security attributes defined by L. Law, an Elliptic Curve Cryptography based Secure and efficient authenticated key agreement protocol - SEAK protocol are proposed.

为此，按照L.Law所定义的认证密钥协商协议的安全特性，提出一种基于椭圆曲线密码体制的安全高效认证密钥协商协议——SEAK协议。

The paper is organized as follows: In Chapter 1, we review briefly the development of the subelliptic equations, and introduce the content of this dissertation together with some elementary knowledge which is necessary in this paper.

全文组织如下：第一章介绍了次椭圆方程的研究意义及现状，并给出全文将要用到的基础知识和本文的主要研究内容。

Considering three kinds of most important and closely related vector fields, we investigate the maximum principles and L~p estimates to some nonlinear subelliptic equations.

本文以极大值原理和解的L~p估计为主线，涉及到三类最具有代表性并且也是密切相关的向量场，研究了与之相关的非线性次椭圆方程。

Secondly, by using the Sobolev inequality on the C-C spaces we prove a Fefferman-Phong type lemma. Based on which we provide nonexistence theorems to three kinds of nonlinear subelliptic parabolic equations through a relatively unified method.

其次，利用Carnot-Caratheodory空间上的Sobolev不等式证明了一个Fefferman-Phong型引理，并用比较统一的方法证明了三类非线性次椭圆抛物方程解的不存在性判定定理。

Firstly, a homogeneous Harnack inequality as well as a maximum principle of nonhomogeneous subelliptic p-Laplace equations is proved by improving the classical Moser iteration method. The optimal estimate of m is also obtained through log |log| method.

首先改进经典的Moser迭代方法，证明了非齐次次椭圆p-Laplace方程的极大值原理和齐次Harnack不等式，并利用log |log|方法给出了不等式右端指数m的最佳上界估计。

According to the actual ellipse ring diffuse rule of some submonition s fall points,a Monte Carlo model of calculating the DPR when the fire direction deviate the runway s axial direction is established and the damage efficiency of the runway with the change of fire d.

针对常规导弹对机场跑道打击效果的问题，根据某型子母弹实际落点的椭圆环散布规律，建立了射向与跑道主轴成一定夹角时跑道失效率的Monte Carlo模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。